Ionospheric Scintillation Predictions For Goes
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Ionospheric Scintillation Predictions For Goes
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Author : Joseph Horace Pope
language : en
Publisher:
Release Date : 1973
Ionospheric Scintillation Predictions For Goes written by Joseph Horace Pope and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1973 with Ionosphere categories.
A world-wide model of ionospheric irregularities giving rise to scintillations was developed by Fremouw and Rino of Stanford Research Institute. This model takes into consideration diurnal, seasonal, and solar variations. Also considered is the dependence on geomagnetic latitude, frequency, and the geometry between the transmitter and the receiver. This model was used to make computations appropriate for the GOES system, assuming the satellite to be parked on 100°W longitude. Calculations were made at 400 MHz for sunspot numbers 30, 100, and 200, coo responding to low, medium, and high solar activity; for solstice and equinoctial periods; and for several times of the day. The results are presented as contour maps of the earth as viewed from GOES. The results show that for low solar activity periods serious scintillations will occur only within about ± 10 degrees of the geomagnetic equator. During moderately active periods stations located in the vicinity of the auroral zones will also be affected. The worst case condition occurs for sunspot number 200, during the equinox, and at midnight , on the longitude of the geostationary satellite. In general, the mid-latitude regions are relatively free from scintillations. These results should be useful in determining the positioning and programming of the data readout of the numerous surface-based stations to be used in connection with the data collection and relay subsystem.
Ionospheric Scintillation Predictions For Ats F At 40 And 360 Mhz
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Author : Joseph Horace Pope
language : en
Publisher:
Release Date : 1973
Ionospheric Scintillation Predictions For Ats F At 40 And 360 Mhz written by Joseph Horace Pope and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1973 with Ionosphere categories.
The Prediction Of Ionospheric Conditions
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Author : G.S. Ivanov-Kholodny
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
The Prediction Of Ionospheric Conditions written by G.S. Ivanov-Kholodny and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
The ionosphere of the Earth has been actively studied since the 1920's, following the discovery of ground radio-sounding. By means of this method results were ohtained by an international network of ionospheric stations, in particular, by the successful implementation of a number of rigorously planned international scientific research programs,'" enabling the collection of extensive experimental material on some of the most important parameters of the ionosphere - the critical freLjuencies of E-, Fl and F2-layers. Comprehensive analyses of these observation data give a fairly complete picture of the various changes taking place in the principal ionospheric layers at different points on our globe. Another important aspect of the study of the ionosphere, which has been in progress for the past three decades, is an extensive program of in situ determinations of the various physical parameters - first using rockets, and subsequently artificial satellites. The data thus obtained on the principal ionizing agent - short-wave solar radiation - and on the physical conditions prevailing in the upper atmosphere and in the ionosphere at different altitudes, allow the proposal of a self-consistent mechanism of ionosphere formation. A general outline of the theory of ionosphere formation at different altitudes is now complete. Its application to specific cases, dependent on a more accurate determination of input parameters to give solutions valid for a definite set of conditions etc., is yet to be accomplished. The use of artificial satellites in cosmic research yielded abundant scientific data.
Prediction Of Ionospheric Scintillations For Sattelite Signals In Communications And Navigations
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Author : H. J. Albrecht
language : en
Publisher:
Release Date : 1971
Prediction Of Ionospheric Scintillations For Sattelite Signals In Communications And Navigations written by H. J. Albrecht and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1971 with categories.
Global Morphology Of Ionospheric Scintillations Ii
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Author : Jules Aarons
language : en
Publisher:
Release Date : 1975
Global Morphology Of Ionospheric Scintillations Ii written by Jules Aarons and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1975 with F region categories.
Updating a review of the global morphology of ionospheric scintillations published in 1971, this study adds additional experimental studies on familiar topics to newer types of measurements of ionospheric irregularities, including in situ experiments and artificial heating of the F-layer.
Ionospheric Predictions For
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Author :
language : en
Publisher:
Release Date : 1963
Ionospheric Predictions For written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1963 with Ionospheric forecasting categories.
Ionospheric Predictions
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Author : Institute for Telecommunication Sciences
language : en
Publisher:
Release Date : 1971
Ionospheric Predictions written by Institute for Telecommunication Sciences and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1971 with Graphic methods categories.
Ionospheric Scintillation Modeling Needs And Tricks
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Author : Shishir Priyadarshi
language : en
Publisher:
Release Date : 2022
Ionospheric Scintillation Modeling Needs And Tricks written by Shishir Priyadarshi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022 with Electronic books categories.
The wavelength of the radio-wave satellite signal is of the order of the minimal small-scale ionospheric irregularities (i.e., a few centimeters). As the satellite signal passes through the ionosphere, its interaction with the ionospheric irregularity structures causes refraction, reflection, and polarization in the satellite signal. Ionospheric irregularities degrade the trans-ionospheric radio-wave signal quality, between the satellite and the receivers, due to scintillation. The physics-based model often fails to produce global morphology during the extreme solar events, whereas empirical models based on the ionospheric scintillation data demonstrate better quality to forecast the scintillation effects during extreme solar event. It is really tricky to make a scintillation model that is sensitive to low and high solar activities as well as extreme solar events simultaneously. In the presented book chapter, we will discuss/review the needs and tricks of modeling ionospheric scintillation during extreme solar events as well as all weather and latitudinal cases. There are several aspects that influence the scintillation occurrence, its strength, and global distribution. The latitudinal dependence, local weather, solar/geomagnetic activity conditions, and local times are the widely accepted factors that control and influence ionospheric scintillation most. This book chapter discusses all these aspects and also suggests the ways to cast aside those factors that led to the wrong measure of scintillation indices.
Ionospheric Prediction And Forecasting
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Author : Bruno Zolesi
language : en
Publisher: Springer
Release Date : 2016-08-27
Ionospheric Prediction And Forecasting written by Bruno Zolesi and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-08-27 with Science categories.
This book describes how to predict and forecast the state of planet Earth’s ionosphere under quiet and disturbed conditions in terms of dynamical processes in the weakly ionized plasma media of the upper atmosphere and their relation to available modern measurements and modelling techniques. It explains the close relationship between the state of the media and the radio wave propagation conditions via this media. The prediction and forecasting algorithms, methods and models are oriented towards providing a practical approach to ionospherically dependent systems design and engineering. Proper understanding of the ionosphere is of fundamental practical importance because it is an essential part of telecommunication and navigation systems that use the ionosphere to function or would function much better in its nonappearance on the Earth and on any planet with an atmosphere.
Beyond Land
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Author : Shivani
language : en
Publisher: Tredition Gmbh
Release Date : 2024-05-29
Beyond Land written by Shivani and has been published by Tredition Gmbh this book supported file pdf, txt, epub, kindle and other format this book has been release on 2024-05-29 with Computers categories.
Imagine navigating the vast expanse of the South Atlantic Ocean, where traditional methods like land-based stations can't reach. Here's where a groundbreaking approach emerges: using a mobile GNSS (Global Navigation Satellite System) receiver to explore "ionospheric scintillation" in this remote region. Ionospheric scintillation is a rapid fluctuation in radio signals caused by variations in electron density within the upper atmosphere. The South Atlantic Anomaly (SAA), a region with a weakened magnetic field, intensifies this phenomenon. For navigation systems like GPS, scintillation can lead to errors or even signal loss. Traditionally, studying scintillation relied on land-based receivers, leaving vast ocean areas unexplored. This mobile GNSS receiver mounted on a research vessel ventures into the heart of the SAA, collecting real-time data on scintillation intensity and its effects on GNSS signals. This groundbreaking approach offers several advantages. It allows scientists to map the spatial extent of scintillation within the SAA, creating a more comprehensive picture of this phenomenon. By studying how scintillation intensity varies across the region, scientists can refine prediction models for safer navigation. Furthermore, a mobile receiver can capture the dynamic nature of scintillation. Unlike land-based stations with fixed locations, the mobile receiver offers a continuous stream of data, revealing how scintillation intensity changes over time. This data is crucial for understanding how scintillation events evolve and their potential impact on GNSS users. The information gleaned from such expeditions paves the way for improved navigation in the South Atlantic. By understanding scintillation patterns, mitigation strategies like using multiple frequencies or real-time signal correction techniques can be developed. Ultimately, venturing "beyond land" with a mobile GNSS receiver is a critical step towards ensuring safe and reliable navigation in this challeng